Question

find the force required to stop a car of mass 10 kg with two passengers each of 50 kg sitting inside if it is moving at 60 kilometre per hour speed and takes 5 second to stop​

Answer 1

Explanation:

AS WE KNOW THAT

FORCE=MA

SO THEREFORE

MASS =MASS OF CAR + MASS OF 2 PASSENGERS

MASS =10+50*2

=110

NOW ACCLERATION = CHANGE IN VELOCITY ÷CHANGE IN TIME

=VELOCITY =60*5/18

= 50/3 m/s

time = 5 sec

so therefore put in above formula

=50÷3÷5

= 3.33m/sec square

so therefore force = ma

=110*10÷3

1100÷3 N

366.66Newton

therefore force applied is equals to 366.66 newton

please check the ans once

not sure